ML19242A153
| ML19242A153 | |
| Person / Time | |
|---|---|
| Site: | Atlantic Nuclear Power Plant  |
| Issue date: | 07/11/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Zechella A OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI |
| References | |
| NUDOCS 7907310391 | |
| Download: ML19242A153 (1) | |
Text
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UNITED STATES
/ f y['ga arc o, NUCLEAR REGULATORY COMMISSION
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E REGION 11 101 M ARIE TT A ST., N W. SUIT E 310o k;[j'f o
AT L ANT A. GEORGI A 30303
- g JUL111979 In Reply Refer To:
RII:JPO 50-437 Offshore Power Systems ATTN:
A. P. Zechella, President P. O. Box 8000 Jacksonville, FL 32211 Gentlemen:
A vritten The enclosed Bulletin No. 79-15 is forwarded to you for action.
response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, K+~ ~.%
n k James P. O'Reilly Director
Enclosures:
1.
Listing of IE Bulletins Issued in Last 12 Months s
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7907310391 N_
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4 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EbTORCEMENT WASHINGTON, D.C.
20555 July 11, 1979 IE Bulletin No. 79-15 DEEP DRAFI PUMP DEFICIENCIES Description of Circu= stances:
Cocronvealth Edison Company reported that manuf acturing On October 20, 1978, deficiencies had been identified in new high pressure cor Co:pany, Cateron Pu=p Division.
Each of these pumps is a vertical turbine pu=p with impellers located in bowls The motor (prime mover) is located at in a su=p or a self contained barrel.
the highest pump elevation to take into account maximu= flooding at the site The auction is at the lover end of the pu=p while or space considerations.
Bearings supportirig the vertical the discharge head is just below the driver.
shaft segments (usually 5 to 10 segments) are either sel These pu=ps are designated as " Deep Draft".
Figures their own isolated system.
162 show typical outlines of such pu=ps.
The internal deficiencies, identified through dimensional and visus 1 inspections were as follows:
29APKD-5) (Date of Manufacture -
lov Pressure Core Spray Pumps (I-R Model No.
Feburary 1973)
Loose impeller bol:s and bolts improperly staked Loose key - keyvay fit Excessive runout on pump shaf t Bearing shoved wear Bearing clearance exceeded recocoended tolerance Coupling thread galled Wear ring clearance out-of-tpecification Impeller-to-shaft clearance out o' [r ~ tfication Cracksfoundinsecond-and-thirdk
' k CATE D Stuffing box bushings were severe High Pr.ssure Core Spray Pu=ps (I-R! j gEntire documen September 1972) fJ system Previous 2 undOr:
Y entoreg Bearing clearance exceeded reco$
ANO 7 %
Vearringclearanceout-of-spech, O/25 No. of Bearings shoved wear q
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